Medizinische Bildgebung. [Volume 7: Medical Imaging]. Ed. by Dössel, Olaf / Buzug, Thorsten M. Die bildgebenden Verfahren in der Medizin. Dössel, Olaf. Olaf Dössel. Prof. Dr. rer. nat. Olaf Dössel. Sprecher der kollegialen Bildgebende Verfahren in der Medizin II · Vorlesung. Lichttechnik-Hörsaal (LTI) External. – Buy Bildgebende Verfahren in der Medizin: Von der Technik zur medizinischen Anwendung book online at best prices in Olaf Dössel (Author).

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Using synthetic input data and different ion current formulations from the Courtemanche et al.

Prof. Dr. rer. nat. Olaf Dössel

Error propagation theory was applied to identify optimal sequence parameters and to facilitate a systematic noise dsse, to standard AFI. In the bildgebbende k-space, the homogeneity requirement is relaxed to reduce the average SAR of verfahen scan. Three-dimensional 3-D reconstruction of the coronary arteries during a cardiac catheter-based intervention can be performed from a C-arm based rotational x-ray angiography sequence.

Band 7 Medizinische Bildgebung [Volume 7: Inconsistencies in the projection data, due to heart motion, degrade the image quality. The efficacy of the algorithm is demonstrated in four patients suffering from left bundle branch block LBBB and myocardial infarction MI.

Using them some results were gained for the simulation of typical arrhythmias, in the field of validation using an animal model and for therapy planning with RF-ablation.

KIT – Team – Dössel, Olaf

A flexible catheter design avoids perforation but may lead to spline bunching and influence coverage. We found that the best performing method was the wavelet-based baseline cancellation.

Concepts based onstatistical independence like principal component analysis PCA cannot be applied for VFF removalduring atrial tachycardia with stable conduction. The personalized model present in this research is an effective tool for therapy planning of BVP in patients with congestive heart failure.

Magnetic resonance in medicine 66 6, Computer simulations of the effects of antiarrhythmic drugs on cardiac electrophysiology are a helpful tool to better understand the mechanisms responsible for persistence and termination of AF.

ECG and intracardiac data build the basis for excitation personalization. Automatic interpretation of intracardiac mapping data could help to improve the treatment strategy in complex cases of AT. Cardiac electrical sources were derived bildgeebende realistic atrial and ventricular simulations.


Corresponding numerical simulations and initial experiments on a standard clinical MRI system underline the principal feasibility of EPT to determine the electric conductivity and the local SAR.

The amplitudes of both atrial and ventricular ECGs were most sensitive for blood, skeletal muscle conductivity and anisotropy as well as for heart, fat, and lungs. We show that a simulation with a patient-specific model including left atrial regional fibrosis derived from LGE-MRI reproduces local activation in the left atrium more precisely than the regular simulation without fibrosis. In a realistic atrial simulation, the method could clearly distinguish between stimuli from different pulmonary veins.

The study underlines the ability of ECG imaging to produce activation times of ventricular electric activity-and to represent effects of scar tissue in the imaged transmembrane voltages. The reverse biorthogonal wavelet 3. In den Lebenswissenschaften ist die Individualisierte Medizin aktuell ein zentrales Thema, vielleicht ein Hype.

A simplified way of coupling the modulation and feedback current directly to the coupling coil is realized The complete SQUID module including the superconducting shield was miniaturized down to a diameter of 5mm. Cardiologists measure electric signals inside the human heart aiming at a better diagnosis and optimized therapy of atrial arrhythmias like atrial flutter and atrial fibrillation.

This is important both for improving cardiac models and also for clinical applications, such as characterizing arrhythmogenic substrates during sinus rhythm. Tomosynthese Mertelmeier, Thomas Pages Read more Read less. Action potential alternans at high frequencies was observed over the whole dronedarone concentration range at high frequencies, while amiodarone caused alternans only in a narrow range. The anatomy of a patient suffering from left bundle branch block and myocardial infarction is extracted from a series of MR data sets.

Further, medizon was assessed if an additional ECG electrode with optimized position or the right-sided Wilson leads can improve sensitivity ih the standard lead ECG. AmazonGlobal Ship Orders Internationally. The computation of this matrix using the finite element method can be quite dssle. Die Wissenschaft dient dem Erkenntnisgewinn. A common approach is to leave the structure of established models unaltered and estimate the values of a set of parameters.


From the users point of view the most important quality factor is the accuracy with which a current dipole can be localized. Inverse problem of electro-and magnetocardiography: As a result, the WL was prolonged by dronedarone and shortened by high concentration of amiodarone.

Stable rotors were successfully induced in different regions of the homogeneously remodelled atrium showing that rotors are not constrained to unique anatomical structures or locations. Spiral waves could be initiated by using mutation models as opposed to the control case.

Bildgebende Verfahren in Der Medizin : Olaf Dössel :

No single rhythmical or morphological feature was able to differentiate between all three levels. The quantitative evaluation of the experiments delivers an average registration accuracy for all catheter electrodes bildgenende 0. In this paper, we apply a binary optimization approach to the transmembrane voltage TMV -based problem.

Reconstructions from clinical cases are presented, displaying high contrast, sharpness, and level of detail.

In contrast to previous methods to measure the patient’s electric properties, EPT does not apply externally mounted electrodes, currents, or RF probes, thus enhancing the practicability of the approach. Corresponding numerical simulations using finite-difference time-domain methods support the feasibility of this phase-based conductivity imaging and magnitude-based permittivity imaging. The tracking accuracy is evaluated on simulated and clinical rotational angiography data of the contrast enhanced left dsssel.

The electric conductivity can potentially be used as an additional diagnostic parameter, e. Furthermore, a new approach to the analysis of HRT is verfahten. These data sets are forward projected using a C-arm CT system geometry and generate artefacts comparable to those observed in clinical cardiac C-arm CT acquisitions.

In contrast to other methods to measure the patient’s electric properties, EPT does not apply externally mounted electrodes, currents, or radiofrequency probes, which enhances the practicability of the approach.